Merge branch 'issue/5254' into 'master'

Cronjob locking not working properly

Closes #5254

See merge request ispconfig/ispconfig3!876

Author: Till Brehm

server/lib/classes/cronjob.inc.php

@@ -86,8 +86,8 @@ public function run() {
 		if($run_it == true) {
 			$this->onRunJob();
 			$this->onAfterRun();
+			$this->onCompleted();
 		}
-		$this->onCompleted();
 
 		return;
 	}